Acquisitions and Collaborative Agreements (Details) (The Respiratory Delivery Platform [Member], USD $) In Millions, unless otherwise specified	1 Months Ended
	Dec. 31, 2011	Dec. 23, 2011
The Respiratory Delivery Platform [Member]
Business Acquisition [Line Items]
Total purchase consideration		$ 348
Initial cash payment		22
Assumed liabilities		4
Contingent consideration		322
Purchase price allocation, in-process research & development		338
Purchase price allocation, fixed assets		8
Purchase price allocation, goodwill		$ 2
Rate used to discount net cash inflows to present values	12.50%